Solubility of Components, Phase Equilibria, and Extractive Salt Crystallization in the Ternary Lithium Chloride + Water + Triethylamine System from T = 293.15 to 363.15 K
Veronika Danilina, Dmitry Cherkasov*, Yana Klimova and Konstantin Ilin,
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引用次数: 0
Abstract
Phase equilibria and the solubility of components in the system lithium chloride + water + triethylamine (TEA) were studied in the range 293.15–363.15 K by the visual polythermal method. In this temperature range, the constituent two-component system H2O + TEA delaminates (LCST = 291.45 K), and the salt forms a crystal hydrate (LiCl·H2O). The phase diagrams of the ternary system at 293.15, 323.15, and 363.15 K were plotted. LiCl·H2O is in equilibrium with two liquid phases. The compositions of the equilibrium organic and aqueous phases of the monotectic state were established graphically. The salting-out effect of the salt crystal hydrate on water–amine mixtures is enhanced with increasing temperature. The coefficient of TEA distribution between the liquid phases of the monotectic state was calculated at eight temperatures. Based on our analysis of the plotted isothermal phase diagrams, the yield of LiCl·H2O crystals in the range from 293.15 to 313.15 K was graphically estimated by the extractive crystallization method. The maximum yield of salt crystal hydrate (39.6%) falls on 70 wt % of the introduced TEA at 293.15 K. The obtained data on solubility and phase equilibria will be useful for optimizing technological processes involving lithium chloride.
期刊介绍:
The Journal of Chemical & Engineering Data is a monthly journal devoted to the publication of data obtained from both experiment and computation, which are viewed as complementary. It is the only American Chemical Society journal primarily concerned with articles containing data on the phase behavior and the physical, thermodynamic, and transport properties of well-defined materials, including complex mixtures of known compositions. While environmental and biological samples are of interest, their compositions must be known and reproducible. As a result, adsorption on natural product materials does not generally fit within the scope of Journal of Chemical & Engineering Data.